Burglar-alarm.



A. J. ROZBORIL.

BURGLAR ALARM.

APPLICATION FILED APR 19,1913

Patented Nov. 24, 1914.

1 1,7116% WW 1 WW w w 0 m H J W Z w m ANDREW J. ROZBORIL, OF PUEBLO,COLORADO.

BURGLAR-ALARM.

Specification of Letters Patent.

Patented Nov. 24, 1914 Application filed April 19, 1913. Serial No.762,272.

To all whom it may concern:

Be it known that I, Annanw J. Roznonln, a. citizen of the United States,residing at Pueblo, in, the county of Pueblo and State of Colorado, haveinvented new and useful Improvements in Bi'irglar-Alarms, of which thefollowing is a specification.

This invention relates to burglar alarms and more particularly toaudible alarms which are actuated in the opening of a door, window orother closure.

One of the principal objects of the inven tion is the provision ofsimple and eflicient inccl'ianisiu actuated upon the opening of a windowor door to explode a cartridge, wl'icreoy the impression will be giventhat the owner or occupant of the house is firing at the intruder.

Anothe and very important object of the invention is the provision of adevice of this character employing mechanism which includes alilllllllle and a trigger ar 'anged in. cmicting relation so that thetrigger will hold the hammer in cocked position or in uncooked positionremoved from the cartridge, and whereby the hammer in uncooked positionwill hold the trigger out of the path of the sash or door so thateitherof these parts may he operated without affectin g r the alarm.

Further objects of the invention will appear as the following specificdescription is read in connection with the accompanying drawing whichforms a part of this application and, in which Figure 1 is a plan viewshowing the parts in operative position; Fig. 2 is a side elevation ofthe same; Fig. 3 is a side elevation showing the arrangement of theparts with the hammer in, uncooked position; and Fig. l is a top planview of the device shown applied. to a window. ing, 1 represents abascfprovided adjacent its ends with openings to receive attachingReferring more particularly to the drawdevices 2.

In Figs. 1 and 2 the device is shown secured to the frame of a door insuch position that the trigger will be operated upon opening of thedoor, while in Fig. 4 the device is arranged upon the upper sash of awindow and with the trigger lying in position to be actuated upon theraising of the lower sash or the lowering of the upper sash. Formedintegral with the base is a raised cylinder member 3 and a lug 4: inwhich is ournaled a transverse shaft 5 having secured thereto 1 thehammer or striking element 6 provided with a cap engaging pin 7 adaptedto strike the cap of a cartridge 8 when operated, as

will he hereinafter described, the said hammer having an upwardlyprojecting arm (3 for a purpose to be hereinafter explained.

The cartridge is arranged in a diagonal bore 1) formed in a raised boss10 immediately forward of the shaft 5. Extending:

through the cylinder member 3 longitudinally of the base is a shaft 11having one of its terminals bent to provide a locking extension 12 andhaving its opposite end bent at a point 13, to provide anoperatingtrigger-ll: which extends parallel with the extension 12. This triggeris adapted to lie over the armh of the hammer and hold the hammer indepressed position against the tension of the operating spring 15 whichsurrounds the shaft between the hammer and the lug -.l-. and isconnected one end to each of these parts. In order to hold the triggerin depressed position there is secured to the base a small raised yoke16 which is engaged by the offset end 17 of a spring 18 secured to theunderside of the trigger, as shown.

In operation, the cartridgeis placed in the bore 8 and the hammerdepressed to the position shown in Fig. 2, against the tension of thespring 15. The shaft 11 is turned in the cylindrical. member 3 bydepressingthe trigger 1 1 so as to carry the trigger over the arm 6 ofthe hammer and to lock the spring 18 in engagement with the yoke 16. Inthis position the trigger is arranged over or in the path of the door orlower sash. as the case may be, and when either part is open the triggerwill be raised sufliciently to disengage the spring 18 from the yoke 16.When this is accomplished the tension of the spring 15 on the hammerwill throw the trigger to one side and permit the hammer to forciblyengage the cap 1 on the cartridge, exploding the same and sounding thealarm. When it IS desired to hold the parts in inactive position thetrigger is raised and the hammer allowed to swing over toward thisposition the locking extension will hold the hammer out of engagementwith the cartridge and the hammer will hold the trigger out of the pathof the door or sash, thus permitting either of these parts to beoperated without sounding the alarm. In other words, the lockingextension 12 practically holds the hammer at half cock and should thetrigger be actuated the throw of the hammer would be so small and thestriking force so light that the cartridge would not be exploded.

lVhat I claim is Aburglar alarm comprising a base plate having a firingchamber mounted thereon, a lug projecting upwardly from one side of thebaseplate, a cylindrical member mounted on the base plate and oppositethe said lug and provided with a longitudinal passage therein, and atransverse passage underlying the said longitudinal passage, a shaftmounted transversely of the base plate and having its opposite endsjournaled respectively in the lug and the transverse passage in thecylindrical member, a hammer fixedly mounted-on the transverse shaft andprovided with a firing pin, and an arm arranged at an angle to thefiring pin, a trighaving a laterally extending arm adapted,

to engage over the arm on the trigger when the latter is in full cockposition and to terminally extend beyond one of the longitudinal edgesof the base plate, said trig ger having its opposite end bent intoparallelism with the first mentioned end so as to engage under thefiring pin when the ham mer is in half-cock position, a yoke mounted onthe base plate, a spring mountedon the trigger and adapted to engagewith the yoke to lock the hammer when the latter is in full cockposition and a spring on the shaft forcing the hammer in the directionof the firing chamber when the spring on the trigger is released fromthe yoke on the base plate.

In testimonywhereof I aflix my signature in presence of two witnesses.

GORDON F. RENNET, LEO. RozBoRIL.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner ofJPatents, Washington, D. '0.

